Feed and speed changing device for machine-tools.



. PATENTED AUG. 30, 1904. l R. K. LE BLOND & W. E. GROENE. i FEED ANDSPEED CHANGING DEVICE FOR MACHINE-TOOLS.

APPLICATION FILED MAY 17, 1904'I 2 sHEBTs-snssr 1-.

No MODEL.

WlT/VESSES:

BY ff,

ATTORNEY No. 768,608. I N PATENTED AUG. 3o, 1904. R. K. LE BLOND & W. P.GROENE.

REED AND SPEED CHANGING DEVICE FOR'MAOHIN-E TOOLS.

APPLICATION FILED MAY 17. 1904.

' No MODEL.

Arme/ver UNITED vSTATES Patented August 30, 1904.

PATENT OFFICE. l

FEED AND ,SPEED CHANGING DEVICE FOR MACHINE-TOOLS.

SPE.CIFICATIONl forming part of Letters Patent No. 768,608, dated-August30,1904. Application filed May 17, 1904. Serial No. 208,422. (No model.)l

T all whom; it may con/cern:

Be it known that we', RICHARD K. Ln BLOND and WILLIAM F. GROENE, ,ecitizens of the- United States, residing at Cincinnati, in the county ofHamilton and State of Ohio, have `invented certain new and usefulImprovements in Feed and Speed Changing Devices for Machine-Tools, ofwhich the following is a speciiication.

The invention to be hereinafter described l relates to feed and speedchanging devices which may be employed generally in any machine where itis desired that certain mechanism shall be driven atdifferent speeds atdifferent times; and the object of the present in.- vention, generallystated, is toprovide a device adapted to these conditions which will besusceptible of a wide range of variation in.

the speeds derivable therefrom and furnish a simple form of mechanicalparts readily manipulated during the continued movement of .the drivingelement to effect the changes deand in dotted lines the gears andelements beyond. Fig. 2 is a section of the parts shown in Fig. l online Fig. .3 lis a front View similar to Fig. l with' the front of thecasing or inclosing boX removed; and Fig. 4v is a detached detail of theelongated gear and'yolieframes, some of the`parts being yin section.Fig. 5 isa ldetached detail of a modified form of transmitting-gearing.y

In the drawings, A represents any usual or preferred character of casingfor inclosing the working parts-of the device. Mounted in 'suitablebearings-as, for instance, bearings a' a'v-in the sides ofthe casing Ais the shaft A/, which may' be driven Vfrom any suitable sourceofpower,and such shaft for the purpose of identification will hereinafter bereferred to as the driving-shaft, Also mounted in the casing A inappropriatebearings is the shaft B, from which the motion derived -fromthe driving-shaft A is to be transmitted inafter referredl to as thedriven shaft.

The terms driving and "driven are merely relative, and it is evidentofcourse that the motion might be transmitted from shaft B to shaftA', inwhich case shaft B would be the driving-shaft and shaft A the drivenshaft.

Disposed'between the driving and driven shafts is the elongatedvariable-speed gear C, mounted upon the shaft C', sustained in any usualor desired manner by the casing A.

As a general statement of the contemplated embodiment of theinvention,there is disposed between the driving-shaft A and elongated gear Cvariable-speed-transmitting gearing lwhereby-*the elongated gear C maybe driven from the driving-shaft' at variable' speeds, and V'interposedbetween the driven shaft and the elongated variable-speed gearing Cis avariable-speed-transmitting gearing, all of which will hereinafter bemore fully and definitely described.` From the general'outline of theinvention as thus stated it Will appear that the elongatedvariable-speed gear C is driven from the'driving-shaft Al at variablespeeds and that the variable speed of gear C is transmitted to thedrivenshaft B by-aset of variable-speed gearing, so that the variable speedofthe gear C may be transmittedat still varying speeds to the drivenshaft. Y

Referringto the drawings for a detailed illustration'of the embodimentof the invention, the driving-shaft A has mounted there' on to rotatetherewith a series of gears A2 A Af, said gears being of differentdiameters IOO bushings CZ, so that by removal of said sleeves orbushings the shaft D may be removed from the casing at will. Thetransmitting eccentric shaft (indicated as a whole by the letter D) hasan eccentric portion D', on which is mounted to rotate in unison aseries of gears D2, D3, and D", said gears being of dilferent diametersand being suitably held in their associated relation on`the eccentricportion D of the shaft, between the arms (Z2, connected to the handleD5, said arms (Z2 being splined to the eccentric portion D of the shaft,so that by means of said handle D5 the series of gears D2,'D3, and DA1may be moved longitudinally of the shaft, as will be obvious, and by anupward or downward movement of the operating-handle D5 the saidtransmitting eccentric shaft may be turned in its bearings, it beingunderstood, of course, that the series of gears D2 D3 D1, whilemaintained in their associated relation upon the shaft D in the mannerstated, are free to rotate thereon and yet be movable longitudinally ofthe shaft by movement of the handle D, as already described.

It will be noted by reference to Figs. 2 and 3 of the drawings that thelargest gear, D2, of the series of gears on the transmitting eccentricshaft is in engagement with the elongated variable-speed gear C and, byvirtue of the position of said gear C that, said engagement therewith ofthe largest gear D remains continuous, notwithstanding any eccentricmotion that may be given to the series of gears by the upward ordownward movement of the handle D5. As hereinbefore stated, the gears A2A3 A on the driving-shaft are held in separate relation with respect tothe smallest gear Aof the series, and such distance of separation isapproximately equal to the faced width of the large gear D2 of theseries of transmitting-gears on the transmitting eccentric shaft, sothat upon an upward movement of the handle D5 the eccentric portion D ofthe shaft D will disengage the series of gears D2 D3 D'l from the gearson the driving-shaft, where, upon movement either to the right or theleft from the position engaged in Fig. 3, the large gear D2 will move tothe space between the gears on the driving-shaft, and one of the othergears, DBDf, will be brought into operative connection with theirrespective and corresponding gears A3 AAi on the driving-shaft tothereby give variable speed to the series of gears on the transmittingeccentric shaft and through them to impart variable speed to theelongated variable-speed gear C, all as will be readily apparent fromFigs. 2 and 3.

Mounted to turn axially of the shaft C, carrying the -elongated gear C,which shaft for identification I will term the variablespeed 7 shaft, isthe yoke-frame, (designated as a whole byGr.) In the construction shownthe arms G' of the yoke-frame G are mounted on the variable-speed shaftC at each side of of the elongated variable-speed gear (l, whieh isthereby held from longitiulinal movement upon said variable-speedshaft', but it will be evident, of course, that other details olmounting of the yoke-frame (i may be employed.

Suitably mounted in the arms of the yokeframe is an intermediate sha ftF1, upon wl i i eh is loosely mounted the intermediate gear lil', whichis free also to move longitmlinally upon said intermediate shaft lil, asmore clearly indicated by Fig. et.

rlhe yoke-frame Gr carries a second yokeframe, (designated asa wholebythe letter ll,) and said second yoke-frame lfl in the embodiment of theinvention herein selected lor illustration is provided with arms ll(`mounted upon the intermediate shaft lC and embracing between them theintermediate gear E, said second yoke-frame being free to havelongitudinal movement upon said intermediate shaft E. From theconstruction thus described it will be apparent that while theintermediate gear E is movable longitudinally of the interlnediate shaftl@ by the second yoke-frame that said intermediate gear E remains inconstant operative relation wit h theA elongated \f*arial ilespeed gear(l.

In order that the yoke-frame (i and the second yoke-frame H may haverelative longitudinal movement by virtue of such movement to the secondyoke-frame and yet such yoke-frames be not permitted free swingingmovement independent of each other, it is necessary that suchyoke-frames shall have another point of connection in addition to themounting of the second yoke-frame on the intermediate shaft. ll'hilevarious forms ol connection might be employed for this purpose, l haveshown as one lorm thereol' the yoke-frame Gr, provided with alongitudinal slot q, extending between the arms in the` connecting-wallr/, from which it will appear that while the second yoke-frame ismovable longitudinally of the yoke-frame (i to carry the intermediategear into various positions along the elongated variable-speed gear (lany upward or downward swinging movement of the second yoke-frame, bymeans ol il s connected handle K, will cause a corresponding swingingmovement of the yoke-frame which for indentilication may be known as themain yoke-frame.

Mounted upon the driven sha i't vl are a series of gears of differentdiameters l to l", which, in effect, constitute a cone of gears, withany one of which the intermediate, gear E may be brought into engagementby the described motions of the second yoke-frame, so as to transmit tosaid cone ol gears, and consequently the driven shaft vB, in a variablemanner the variable speeds imparted to the elongated variable-speed gear(l by the variable-Speed devices connecting said elongatedvariable-speed gear with the driven shal't IC'.

rlhe handle D'i, between the arms d of which IOO ISO

portions L1, so that prior tolongitudinal movement of the series ofgears D2, D3,'and D1 longitudinal of the shaft D for carrying saidlgears into different operative relation and engagement with the gears onthe driving-shaft, it is' necessary to raise such handle D5, and therebyturn the shaftD in its bearings, and by its eccentric portion Dldisengage the gears carried by said shaft D from the gears on thedriving-shaft, a construction which, as will be obvious, prevents thesimultaneous'engagement or partial engagement of any of thev gears D2 D3D1 .with the gears on the driving-shaft, and therefore acts as a safetydeviceto prevent destruction of the gears. Y

The casing .A is likewise provided with a slot M, which in the presentillustration is showninclined to correspond to the inclination of thecone of gears-on thedriven shaft; but ofcourse, as is obvious and aswill be understood, variations may be made within the scope of theinvention. Through this slot M in the casing extends the portion Ml ofthe second yoke-frame, having a recess m and a locking device'o'r pinm', which normally rests uponA the lower straight wall of the slot M inthe casing to hold the intermediate gear E in operative engagement withanyone of the cone of gears on the drivenI shaft.` By retracting thelocking-pin m the second y/okefra'me, and with it the main yoke-frame,may be lowered or turned about its bearingsfor the arms G to therebycarry the intermediate gear E out of engagement with the cone of gears,in which position the second yokeframe H may be moved longitudinally,carrying with it the intermediate gear E into position to be engagedwith 'another one of the gears of the cone of gears when the secondyoke-frame is raised into the position indicated in Fig. 2. If desired,suitable safety devices-as, for instance, the lugs 0 on they inside ofthe casing and the projection p, eX- tending .from the secondyoke-frame-may be employed to prevent upward movement of the yoke-frame,except when the intermediate gear E is in proper position to engage oneof the cone of gears, as will be obvious.

` From the construction described it will be l seen that the elongatedvariable-speed gear is driven from the driving-gear through a set ofspeed-changing gearing, which gives tothe elongated gear any one of aseries of `different speeds, and that such different speeds may betransmitted to the driven shaft B at stillj varying speeds through theset of gearing carried by the yoke-frame, as hereinbefore described.

While we have described in detail the various features'which preferablyconstitute the present embodiment of our invention, it is to beunderstood that the invention is not restricted Vtothese precisedetails, but that they Y may be varied within wide limitsby one skilledin the art. For instance, instead of the eccentric shaft Dvve`mayprovide. an ordinary` shaft, as D10, Fig. 5, and mount the'` 70 gearsD2 D2'D4L thereon to turn together,- and inorder that said gears may beengaged with the gears on the driving-shaft without danger of injury, wemay separate the gears on the drivingshaft a greater vdistance apart, asshown by A12, A13, and A:14 in Fig. 5. In such modiiied form of deviceit is only necessary to move the gears on the shaft D10 lengthwisethereof by the usual handle to carry any one of said gears intoengagement with its appropriate gear on the driving-shaft, as will be yreadily apparent to one skilled in the art. It -will also be evidentthat a wide range of different speeds can be imparted to the drivenshaft B by the general arrangement described, and such range of speedsis especially desirable in some forms of machine-tools.

What we claim, and desire to secureby Letters Patent, is"- l. In a feedand speed changing device for machine-tools,tlie combination of vadrivingshaft, an elongated gear, variable-speed gearing disposed-betweenthe driving-shaft'and said elongated gear and meshing with the latterfor driving it at different speeds, a driven shaft, and variable-speedgearing connecting the said elongated gear with the driven shaft..

2. In a feed andspeed changing device for machine-tools, the combihationof a drivingshaft, a series of gears of ifferent diameters carriedthereby, an elongat d gear, gearing disposed between the said se ies ofgears and said elongated gear and mesl ing with the latter for drivingit at varying speeds, a driven shaft, a series of gears of v ryingdiameters 3 mounted thereon, and means for transmitting the variablekspeed of the elongated gear to any of thegears on the driven shaft.

3. In a feed andspeed l hanging device for' machine-tools, thecombination of a drivingshaft, a series of gears odifferent diametersmounted thereon, an elo i gated variable-speed gear,transmitting-gearing in position between the series of gears on/thedriving-shaft and# said elongated variablespeed gear and `'in mesh withthe latter/'to drive'the same at different speeds, a` driven shaft, acone of gears mounted thereon,A a variable-speed-transmitting gearingdispbsed between the cone of gears and the elongated variable-speed gearand irl-constant operative engagement with IOO IOS

IIS

the latter for transmitting the variable speeds thereof'to the drivenshaft. l

t. In a feed arid speed-changing device for machine-tools the`combination .o`f a: drivingshaft, a driven shaft, anelongated'variablespeed gear disposed between the said shafts, variable-speed gearing interposed between' the driving-shaft and-the elongated.varia-blespeed gear, having constant driving connection therewith andmovable longitudinally thereof while in such driving connection,variable-speed gearing disposed between the elongated variable-speedgear and the driven shaft in constant engagement with the elongatedvariable-speed gear and movable longitudinally thereof.

5. In a feed and speed changing device for machine-tools, thecombination of a drivingshaft, a series of gearings of differentdiameters thereon, a driven shaft, a cone of gears thereon, an elongatedvariable-speed gear disposed between the said shafts, an eccentrictransmitting-shaft disposed between said elongated gear and thedriving-shaft, a series of gears of different diameters on the eccentrictransmitting shaft in constant operative engagement with the elongatedvariable-speed gear and movable longitudinallyT of the eccentrictransmitting-shaft, a yoke-frame, an intermediate gear carried by saidyoke-frame and in constant engagement with the elongated variable-speedgear and means for moving said intermediate gear while in engagementwith the elongated variable-speed gear into and out of engagement withany gears of the cone of gears.

6. In a feed and speed changing device for machine-tools the combinationof a drivingshaft, a series of gears of different diameters mountedthereon, a driven shaft, a cone of gears mounted thereon, an elongatedvariablespeed gear disposed between said shafts, an eccentrictransmitting-shaft, a series of gears of different diameterslongitudinally movable on said eccentric transmitting-shaft and inconstant driving engagement with the elongated variable-speed gear, amain yoke-l' rame, an intermediate gear mounted in said yokeframe and inconstant engagement with tho elongated variable-speed gear, a secondyoke,- frame mounted on the main yoke-fran'le, and means for moving thesecond yoke-frame longitudinally of the main yoke-frame to carry theintermediate gear into engagement with any one of the cone of gears.

7. In a feed and speed changing device for machine-tools, thecombination of a dri\f'ing shaft, a driven shaft, a series of gears ofdifferent diameters on the driving-shaft, an elongated variable-speedgear disposed between said shafts, means for driving the elongatedvariable-speed gear from the driving-shaft at diiierent speeds, a mainand second yokef1ame,movable axially about the elongated variable-speedgear, an intermediate gear in constant driving` connection with theelongated Variable-speed gear and means for moving the second yoke frameand with it the intermediate gear longitudinally of the elongatedvariable-speed gear into engagement with any of the gears of the cone ofgears.

In testimony whereof we aiii x our signatures in presence of twowitnesses.

RICHD. K. LIC BLOND. WIILLIAM I?. GROENE.

IVitnesses:

CLARENCE Eloi-i, ILin'rim E. YOUNG.

